<ui:component xmlns:ui="http://java.sun.com/jsf/facelets"

                xmlns:h="http://java.sun.com/jsf/html"
              xmlns:a4j="http://richfaces.org/a4j">
    <h:form>
        <a4j:commandButton value="new"
                           reRender="mp"
                           oncomplete="#{rich:component('mp')}.show()"/>
    </h:form>
</ui:component>
